deadrise mark
maximum allowable draft mark
plimsoll mark
tonnage mark
第1题：
A.line timing
B.loop timing
C.internal timing
D.through timing
E.external timing
第2题：
A vessel behaves as if all of its weight is acting downward through the center of gravity，and all its support is acting upward through the ______．
A.keel
B.center of buoyancy
C.tipping center
D.amidships section
第3题：
If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.
A.backfire through the air intakes
B.develop less power under load
C.have high firing pressures
D.lift its cylinder relief valves
第4题：
如何让一个区块居中？ （）
第5题：
In small angle stability, when external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the ______.
A.center of gravity
B.center of flotation
C.metacenter
D.metacentric height
第6题：
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the ______.
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
第7题：
A floating vessel will behave as if all of its weight is acting downward through the ______.
A.center of gravity
B.center of buoyancy
C.center of floation
D.Metacenter
第8题：
which order is an equivalent to “send out head line”?
第9题：
Magnetic dip is a measurement of the angle between the ______.
A.geographic pole and the magnetic pole
B.lubber’s line and true north
C.horizontal and the magnetic line of force
D.compass heading and the magnetic heading
第10题：
Adjust the （）(中心稳索), please.